Roller skate



FIG. 1 is a right side elevational view of a roller skate showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a right side elevational view showing the roller skate in extended position and the latch in its raised position. 

The ornamental design for a roller skate, as shown and described. 